Printed impressions



F. A. PUTNAM.

METHOD 0F MAKING PRINTED IMPRESSIGNS. APPLICATION FILED JAN. 6. I9I7.

Fgl/

Patented Aug. 26, 1919.

1 Fred A.IDuTnc1m byzffwww Ays;

UNIITED STATES PATENT OFFICE.

FRED A. PUTNAM, OF MELROSE, MASSACHUSETTS, ASSIGNOR TO VIVIARLKEIVI MACHINE COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

Specification of Letters Patent.

Patented Aug. 26, 1919.

Application led January 6, 1917. Serial No. 141,011.

To all whom t may concern:

Be it known that I, FRED A. PUTNAM, a citizen of the United States, residing at Melrose, county of Middlesex, State of Massachusetts, have invented an Improvement in Methods of making Printed Impressions, of which the following description, in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts.

This invention relates to an improved method or process of making a printed impression, and has for its object to provide an improved method by which half-tones and similar printed impressions can be successfully made on paper which is more or less soft and spongy. y

. I-Ieretofore, it has been considered as im- `practicable to make a printed impression ofthe order of a'half-tone on paper of a spongy nature having a relatively soft or porous surface because the half-tones of a printed impression of this sort become obliterated, thus producing .a very inferior print. `Accordingly it has been the practice to use paper having a relatively smooth or hard surface when good half-tones are desired. By my improved method, however, I can produce a satisfactory half-tone on paper which is of a soft or porous nature.

I accomplish this object by first subjecting the portion of the paper on which the haltone or other impression is to be made to the action of a heated smoothing die which 'compacts the portion of the paper with which it contacts and produces thereon a i hard smooth surface, andthen I make the vprinted impression on this prepared portion of the paper. In thus preparing the portion of the paper which, is to receive the printed impression, I will preferably so treat it that thesurface thereof will be depressed below the surface of the unprepared part of the paper so that the printed impression will be made on a sunken portion of the paper. I will also preferably make the printed impression while the prepared surface of the paper is still warm from the effects of the heated die because by this means the ink constituting the printed impression is more quickly dried.

In order to give an understanding of my invention, I have illustrated in the drawings more or less diagrammatically some of the steps by which the process is carried out, and I will now proceed to describe such drawings and then point out the novel features of the invention in the appended claims. j

Figure l of the drawings is a view illustrating the preliminary. treatment to which the paper is subjected;

Fim 2 is a view showing the paper treated by the heated smoothing, die;

Fig. 3 is a sectional perspective view of a piece of cardboard or similar paper after having been treated;

Fig. 4 illustrates the step of making the printed impression;

F ig. 5 is a view of the paper with the printed impression` thereon;

Fig. 6 illustrates the manner in which a plurality of sheets 0f paper or other material which have been printed in accordance with my process may be stacked up without danger that the printed impressions will becom smooched.

In the drawings, 1 indicates a sheet of cardboard, paper or other material on which the printed impression is to be made. My invention is best applicable where the sheet 1 is rather thick like cardboard, although the invention can be practised equally well on paper of any thickness. I wish it understood, therefore, that the thickness of the paper is not important to the invention.

As stated above, thesheet l is subjected to the action of a heated smoothing die before theprinted impression is made thereon so as to produce a hard smooth surface on the impression receiving portion of the paper. This operation is shown in Fig. 2 wherein the paper 1 is illustrated as beine-supported on a table or support 2, and 3 inc icates more or less diagrammatically the heated smoothing die. This die is formed with a smooth face 4 of a size to cover the portion of the paper on which the impression is to be made.

making the printed impression on said presunken portion and rendering the surface pared sunken portion. thereof smooth and /irm and thereafter 10 4. The steps in the process of making a making the printed impression on the printed impression which consist in first heated, smooth, sunken surface.

sinking the impression-receiving portion of In testimony whereof, I have signed my a sheet on which the printed impression is to name to this specication.

be made below the other portions of said sheet and simultaneously heating said F RED A. PUTNAM.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, 1).'0. 

